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Appropriate datatype for holding percent values?
...ce value (e.g. 100.00% is stored as 100.00), then you should use decimal(5,2) with an appropriate CHECK constraint. Combined with a good column name, it makes it clear to other developers what the data is and how the data is stored in the column.
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REDHAT 6.4 X64下ORACLE 11GR2静默安装 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
REDHAT 6.4 X64下ORACLE 11GR2静默安装前言在某些情况下，我们不具备桌面条件，只能在命令行窗口下安装oracle第一REDHAT6.4安装1.2虚拟机安装REDHAT名称随便自己起我没有外部存储...前言
在某些情况下，我们不具备桌面条件，只能在命...
Set selected option of select box
...code into a $(document).ready:
$(function() {
$("#gate").val('gateway_2');
});
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How to use/install gcc on Mac OS X 10.8 / Xcode 4.4
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423
Update:
You can now just run the following command from your terminal:
xcode-select --install...
Deleting elements from std::set while iterating
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This is implementation dependent:
Standard 23.1.2.8:
The insert members shall not affect the validity of iterators and references to the container, and the erase members shall invalidate only iterators and references to the erased elements.
Maybe you could try t...
Sort Dictionary by keys
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172
let dictionary = [
"A" : [1, 2],
"Z" : [3, 4],
"D" : [5, 6]
]
let sortedKeys = Arra...
What does the [Flags] Enum Attribute mean in C#?
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How can I create a UIColor from a hex string?
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How do I read CSV data into a record array in NumPy?
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edited Mar 2 '12 at 15:05
Mike Graham
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搭建高可用mongodb集群（四）—— 分片 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... 1T 数据，压力太大了！在分给4个机器后，每个机器都是256G，则分摊了集中在一台机器的压力。也许有人问一台机器硬盘加大一点不就可以了，为什么要分给四台机器呢？不要光想到存储空间，实际运行的数据库还有硬盘的读写...